Volumetric Titration with two-component reagents

Advantages of two-component titration:

• Higher titration speed
• Higher accuracy for small amounts of water
• Higher buffer capacity
• Exact and stable concentration

Product range HYDRANAL^® volumetric two-component reagents


Composition
With two-component reagents, the reactants are separated in two solutions: the solvent and the titrating agent. HYDRANAL^®-Solvent is a solution of sulfur dioxide and imidazole in methanol. HYDRANAL^®-Titrant contains a solution of iodine with a precisely defined concentration.

Stability
The titration agents have a shelf life of three years, the solvents five years.

Toxicity
Non-toxic HYDRANAL^®-E type reagents based on ethanol instead of methanol allow safer Karl Fischer titrations.

Using HYDRANAL^®-Solvent / Titrant
We recommend the following procedure for the two-component titration technique (Figure 2.2):

1. Fill the burette with HYDRANAL^®-Titrant (E)
2. Add HYDRANAL^®-Solvent (E) to the titration vessel
3. Titrate to dryness with HYDRANAL^®-Titrant (E)
4. Add sample
5. Titrate the water content with HYDRANAL^®-Titrant (E)

Figure 2.2: Volumetric two-component titration with HYDRANAL® -Solvent (E) / Titrant (E).

• Volumetric titration using one-component reagents
• Coulometric titration

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